A family is mourning the loss of a loved one killed Sunday while serving his country in Afghanistan.   Airforce Tech Sgt. Daniel Douville, of Harvey, died just days ago when a bomb exploded on the border of the Nad’ali district of Helmand Province, Afghanistan. Assigned to the 96th civil Engineer Squadron at Eglin Airforce Base in Fort Walton Beach, Fla., Douville was killed during his second tour of duty in Afghanistan. For 13 years, he took pride in serving his country. "##